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Finding the Fourth Proportional to 688,421.47, 950,000.19 and 378,323.32

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Solution

The fourth proportional to 688,421.47, 950,000.19 and 378,323.32 is: 522,074.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,421.47 : 950,000.19 = 378,323.32 : x
  2. Step 2: Convert to fraction form
    688,421.47/950,000.19 = 378,323.32/x
  3. Step 3: Cross multiply
    688,421.47x = 950,000.19 × 378,323.32
  4. Step 4: Simplify right side
    688,421.47x = 359,407,225,881.43
  5. Step 5: Solve for x
    x = 359,407,225,881.43/688,421.47
  6. Step 6: Final answer
    x = 522,074.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.